Why is weather considered a chaotic system？
A. Because it is made up of random features
Because it is not yet very well understood
C. Because it is described by nonlinear equations
D. Because it does not have an orderly structure
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听力原文：男：你的行李这么多啊，要不要我帮你？
女：我自己来吧。
问：女的是什么意思？
(26)
A. 她觉得行李不多
B. 想让男的帮她
C. 不要男的帮忙
What can be inferred from paragraph 4 about Romanesque architecture？
Arches and barrel vaults were used in the designs.
B. Wood beams characterized the buildings.
C. The structures were smaller than those of Roman style.
D. The architecture was popular during the Roman occupation.
Why does the author mention a car in paragraph 2？
A. The car is an example of how conditions are used to make predictions.
B. The author digresses in order to tell a story about a car.
C. The car introduces the concept of computer models.
D. The mathematical equations for the car are very simple to understand.
All of the following are mentioned as adaptations to the bird's anatomy to accommodate flight EXCEPT
A. a covering of feathers
B. relatively large brains
C. very sharp eyes
D. small legs and feet
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